摘要
本文首先分析了并联型有源电力滤波器(APF)的拓扑结构及模型的建立。对系统的电流环进行分析,考虑各种因素而造成的时间延迟,对APF系统的幅频、相频特性有着较大的影响,为了能够弥补传统PI控制器在有源电力滤波器中应用的局限性,采用了重复控制器。首先阐述了重复控制器的作用原理,并结合PI控制器构成复合控制应用于APF当中;在原有PI控制器的基础上,加入重复控制器,并详细分析了复合控制器的设计过程。在所搭建的实验平台上,针对两种不同性质的负载,结合控制器设计的方法,对比了PI控制器和复合控制器的电流补偿效果,验证了控制方案的有效性。
The paper first discuss about the topology and modeling.Analyzing the current loop of the APF,there are great impacts on the output characteristics of APF for the time delay caused by different factors.In order to make up for the limitations of PI controller, repetitive controller is on use.First,the principle of repetitive controller is described,and then the PI controller and repetitive controller are combined for APF.Based on the original PI controller,repetitive controller is added and the detail of design method for the complex controller is given.With different kinds of Loads,compare the experimental results from PI controller and complex controller,it shows effectiveness of the proposed control method.
出处
《变频器世界》
2010年第7期47-52,46,共7页
The World of Inverters
